CN103762869B - A kind of Type of Switch Stabilivolt Source Circuit - Google Patents
A kind of Type of Switch Stabilivolt Source Circuit Download PDFInfo
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- CN103762869B CN103762869B CN201410052072.0A CN201410052072A CN103762869B CN 103762869 B CN103762869 B CN 103762869B CN 201410052072 A CN201410052072 A CN 201410052072A CN 103762869 B CN103762869 B CN 103762869B
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- 239000003990 capacitor Substances 0.000 claims abstract description 48
- 230000005669 field effect Effects 0.000 claims abstract description 26
- 230000001105 regulatory effect Effects 0.000 claims abstract 7
- 238000004804 winding Methods 0.000 claims description 56
- 230000000087 stabilizing effect Effects 0.000 claims description 22
- 229910000859 α-Fe Inorganic materials 0.000 claims description 5
- 239000003381 stabilizer Substances 0.000 description 11
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- 238000010586 diagram Methods 0.000 description 2
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- 230000000903 blocking effect Effects 0.000 description 1
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Abstract
本发明涉及一种开关稳压电源电路，其包括：变压器，第一电阻，第二电阻，第三电阻，第四电阻，第五电阻，第一电容器，第二电容器，第三电容器，第一稳压管，第二稳压管，第三稳压管，场效应晶体管，磁放大器，第一二极管，第二二极管，第三二极管，三极管，和稳压电路。根据本发明的开关稳压电源电路，通过减小开关晶体管的开关损耗，使得该稳压电源的工作效率大大提高，其稳定性增强，从而提高了电源装置的可靠性。
The present invention relates to a switching regulated power supply circuit, which includes: a transformer, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first capacitor, a second capacitor, a third capacitor, a first A voltage regulator tube, a second voltage regulator tube, a third voltage regulator tube, a field effect transistor, a magnetic amplifier, a first diode, a second diode, a third diode, a triode, and a voltage regulator circuit. According to the switching regulated power supply circuit of the present invention, by reducing the switching loss of the switching transistor, the working efficiency of the regulated power supply is greatly improved, and its stability is enhanced, thereby improving the reliability of the power supply device.
Description
Technical field
The present invention relates to electronic circuit technology field, in particular to a kind of Type of Switch Stabilivolt Source Circuit.
Background technology
Along with construction that is green, Energy-saving Society, the utilance and the stability that improve power supply are more and more taken seriously.But people it is generally acknowledged that the efficiency of switching power supply is high, loss is low, but this loss can not be ignored under many circumstances, and the caloric value that causes of this loss has a strong impact on the reliability of power supply.
Someone wants by miniaturization of components is carried out Loss reducing, but the miniaturization of vigour part will certainly make switching power supply miniaturized, and this just there will be size and the disproportionate supply unit of loss, and its stability can reduce greatly, can not meet the requirement of people.
Because improving power-efficient is the most effectual way improving supply unit reliability, the present invention will provide a kind of novel switched stabilized voltage power supply, which raises power-efficient, thus improve reliability.
Summary of the invention
The invention provides a kind of Type of Switch Stabilivolt Source Circuit, it comprises:
Transformer, the first resistance, the second resistance, the 3rd resistance, 4th resistance, the 5th resistance, the first capacitor, second capacitor, the 3rd capacitor, the first voltage-stabiliser tube, second voltage-stabiliser tube, the 3rd voltage-stabiliser tube, field-effect transistor, magnetic amplifier, the first diode, the second diode, 3rd diode, triode, and voltage stabilizing circuit;
Wherein, one end of the armature winding of magnetic amplifier connects input, the other end of this armature winding connects one end of the first capacitor respectively, one end of second resistance and the drain electrode of field-effect transistor, the other end of this first capacitor connects one end of one end of the second capacitor and the armature winding of transformer respectively, the other end of this second resistance connects one end of the first resistance respectively, the anode of the first voltage stabilizing didoe and the grid of field-effect transistor, the other end of this first resistance connects the negative electrode of the first diode and one end of the 3rd capacitor respectively, one end of the secondary winding of the anode of this first diode and the equal connection transformer of the other end of the 3rd capacitor, the negative electrode of the first voltage stabilizing didoe connects the negative electrode of the second voltage stabilizing didoe, the drain electrode of field-effect transistor connects the negative electrode of the 3rd voltage stabilizing didoe, the source electrode of this field-effect transistor, the anode of the second voltage stabilizing didoe, the anode of the 3rd voltage stabilizing didoe, the other end of the second capacitor, the other end of the armature winding of transformer T1 and the equal ground connection of the other end of secondary winding,
One end of first secondary winding of magnetic amplifier connects the anode of the second diode and the negative electrode of the 3rd diode respectively, the other end of this first secondary winding is connected with one end of the second subprime winding of magnetic amplifier, the other end of this second subprime winding is connected to one end of voltage stabilizing circuit and the 5th resistance respectively, the other end of the 5th resistance connects one end of the 3rd resistance respectively, one end of 4th resistance and the negative electrode of the second diode, the other end of the 4th resistance connects the base stage of voltage stabilizing circuit and triode respectively, the emitter of the other end connecting triode of the 3rd resistance, the collector electrode of triode connects the anode of the 3rd diode.
Wherein, the winding coil of described magnetic amplifier is that the coil measure-alike by two, the number of turn is identical is wound on same ferrite toroidal magnetic core symmetrically.
Wherein, the secondary winding of described magnetic amplifier is divided into 2 windings around on 1 toroidal core.
Wherein, described triode is PNP transistor.
Wherein, the resistance of the first resistance is 75 ohm, the resistance of the second resistance is 300 kilohms, the resistance of the 3rd resistance is 75 ohm, the resistance of the 4th resistance is 510 ohm, the resistance value of the 5th resistance is 500 ohm, the capacitance of the first capacitor is 0.0047uF, the capacitance of the second capacitor is 0.1uF, the capacitance of the 3rd capacitor is 0.0047uF, reference voltage is 2.495V, the armature winding number of turn of transformer be 1000 and secondary winding turns be 1400, the armature winding number of turn of magnetic amplifier be 1100 and secondary winding turns be 3200.
According to Type of Switch Stabilivolt Source Circuit of the present invention, by reducing the switching loss of switching transistor, the operating efficiency of this stabilized voltage power supply is improved greatly, its stability strengthens, thus improves the reliability of supply unit.
Accompanying drawing explanation
Fig. 1 is the schematic block diagram of Type of Switch Stabilivolt Source Circuit of the present invention.
Embodiment
Fig. 1 is the schematic block diagram of switch voltage-stabilizing circuit of the present invention.As shown in the figure, this Type of Switch Stabilivolt Source Circuit comprises:
Transformer T1, the first diode D1, the first resistance R1, the second resistance R2, first capacitor C1, the second capacitor C2, the 3rd capacitor C3, first voltage-stabiliser tube Z1, the second voltage-stabiliser tube Z2, the 3rd voltage-stabiliser tube Z3, field-effect transistor TR1, magnetic amplifier T2, the second diode D2,3rd diode D3, triode TR2, the 3rd resistance R3,4th resistance R4, the 5th resistance R5, and voltage stabilizing circuit.
Wherein, one end of the armature winding of magnetic amplifier T2 connects input, the other end of this armature winding connects one end of the first capacitor C1 respectively, one end of second resistance R2 and the drain electrode of field-effect transistor TR1, the other end of this first capacitor C1 connects one end of one end of the second capacitor C2 and the armature winding of transformer T1 respectively, the other end of this second resistance R2 connects one end of the first resistance R1 respectively, the anode of the first voltage stabilizing didoe Z1 and the grid of field-effect transistor, the other end of this first resistance R1 connects the negative electrode of the first diode D1 and one end of the 3rd capacitor C3 respectively, one end of the secondary winding of the anode of this first diode D1 and the equal connection transformer T1 of the other end of the 3rd capacitor C3, the negative electrode of the first voltage stabilizing didoe Z1 connects the negative electrode of the second voltage stabilizing didoe Z2, the drain electrode of field-effect transistor TR1 connects the negative electrode of the 3rd voltage stabilizing didoe Z3, the source electrode of this field-effect transistor TR1, the anode of the second voltage stabilizing didoe Z2, the anode of the 3rd voltage stabilizing didoe Z3, the other end of the second capacitor C2, the other end of the armature winding of transformer T1 and the equal ground connection of the other end of secondary winding.
One end of first secondary winding Na of magnetic amplifier connects the anode of the second diode D2 and the negative electrode of the 3rd diode D3 respectively, the other end of this first secondary winding Na is connected with one end of the second subprime winding Nb of magnetic amplifier, the other end of this second subprime winding Nb is connected to one end of voltage stabilizing circuit and the 5th resistance R5 respectively, the other end of the 5th resistance R5 connects one end of the 3rd resistance R3 respectively, one end of 4th resistance R4 and the negative electrode of the second diode D2, the other end of the 4th resistance R4 connects the base stage of voltage stabilizing circuit and triode TR2 respectively, the emitter of the other end connecting triode TR2 of the 3rd resistance R3, the collector electrode of triode TR2 connects the anode of the 3rd diode D3.
At described Type of Switch Stabilivolt Source Circuit, field-effect transistor TR1 is used as switching transistor, and described triode is PNP transistor.。
The course of work of switching power supply of the present invention is once described below.
Ac voltage signal inputs from input, because the second capacitor C2 and transformer T1 is connected in parallel and constitutes antiresonant circuit, therefore when electric current flows through transformer T1 and the second capacitor C2 due to the charging/discharging function of the second capacitor C2, make transformer T1 and the second capacitor C2 starting of oscillation in parallel, its objective is the alternating current vibration producing certain frequency, as signal source.In the present invention, the secondary winding of transformer T1 is Opposite direction connection, and resonance potential amplifies the after-applied grid to field-effect transistor TR1 through transformer reversion.In the process; first diode D1 plays rectified action; 3rd capacitor C3 plays high frequency bypass effect; first resistance R1 plays metering function; owing to being applied to the voltage waveform of grid close to sinusoidal wave, the first voltage-stabiliser tube Z1 be connected with this gate connected in parallel and the second voltage-stabiliser tube Z2 plays clamping action, so just effectively protects field-effect transistor TR1 and is not burned; especially, when input voltage is higher, the effect of the first voltage-stabiliser tube Z1 and the second voltage-stabiliser tube Z2 seems particularly important.
After the voltage signal on the grid being applied to field-effect transistor TR1 exports from drain electrode, antiresonant circuit is fed back to by the first capacitor C1, thus constitute the resonant circuit of positive feedback, the effect of this first capacitor C1 absorbs surge current, more gently antiresonant circuit can be flowed to make electric current, the resonance frequency that such antiresonant circuit produces is also close to the resonance frequency of whole power circuit, so just can reduce the switching loss of field-effect transistor TR1, improve the operating efficiency of this Type of Switch Stabilivolt Source Circuit, and the second resistance R2 plays current-limiting protection grid here, so the resistance of this second resistance R2 is general larger.In addition, the three voltage-stabiliser tube Z3 in parallel with the drain electrode of this field-effect transistor TR1 also plays a part to protect this field-effect transistor TR1, namely prevents the excessive damage caused this field-effect transistor TR1 of alternating voltage from input input.
The winding coil that the magnetic amplifier T2 used in Type of Switch Stabilivolt Source Circuit of the present invention uses is choking-winding, the coil that it is measure-alike by two, the number of turn is identical is wound on same ferrite toroidal magnetic core symmetrically, and being formed with ferrite is the common mode disturbances suppression device of magnetic core.Such structure presents large inductance to common-mode signal, inhibited, and presents very little leakage inductance for difference mode signal, works hardly, just effectively can suppress common mode interference signal like this in balanced circuit.Magnetic amplifier of the present invention is divided into 2 windings by around the winding on 1 toroidal core, namely the secondary winding of described magnetic amplifier is divided into 2 windings around on 1 toroidal core, such design makes magnetic amplifier become the choking-winding of common mode form, can output noise be reduced, and reduce power consumption.
In Type of Switch Stabilivolt Source Circuit of the present invention, 4th resistance R4 and the 5th resistance R5 is used as voltage divider, when the primary side output voltage of magnetic amplifier, when the voltage in one of them in the 4th resistance R4 and the 5th resistance R5 exceedes the reference voltage that voltage stabilizing circuit provides, triode TR2 conducting.Scene effect transistor TR1 is in blocking interval, and the collector current of triode TR2 is delivered to magnetic amplifier, and the reset amount of this magnetic amplifier increases, and its effect is that output voltage is reduced.When output voltage is lower than specified level, its action is contrary to the above, so just makes output voltage keep stable.In addition, this second diode D2 and the 3rd diode D3 has also been rectification protective effect.
From the above, due to the effect with the magnetic amplifier of ad hoc structure that the present invention uses, the drain current of field-effect transistor conducting moment can reduce because of the discharging current of exciting current and the first capacitor C1, and scene effect transistor cutoff moment, because the effect of the first capacitor C1 makes voltage rise slack-off, therefore the switching loss of field-effect transistor also diminishes.
The parameter value of respective components and parts of the present invention can be determined according to concrete should being used for, here the parameter value of one group of components and parts used in practice is illustrated, the resistance of the first resistance is 75 ohm, the resistance of the second resistance is 300 kilohms, the resistance of the 3rd resistance is 75 ohm, the resistance of the 4th resistance is 510 ohm, the resistance value of the 5th resistance is 500 ohm, the capacitance of the first capacitor is 0.0047uF, the capacitance of the second capacitor is 0.1uF, the capacitance of the 3rd capacitor is 0.0047uF, reference voltage is 2.495V, the armature winding number of turn of depressor be 1000 and secondary winding turns be 1400, the armature winding number of turn of magnetic amplifier be 1100 and secondary winding turns be 3200.
In above-mentioned power circuit, input the ac voltage signal of a 20V-40V from input, export the voltage through voltage stabilizing process from output and be 24V and electric current is the direct current signal of 1A.
According to Type of Switch Stabilivolt Source Circuit of the present invention, by reducing the switching loss of switching transistor, the operating efficiency of this stabilized voltage power supply is improved greatly, its stability strengthens, thus improves the reliability of supply unit.
Claims (5)
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410052072.0A CN103762869B (en) | 2014-02-14 | 2014-02-14 | A kind of Type of Switch Stabilivolt Source Circuit |
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| CN201410052072.0A CN103762869B (en) | 2014-02-14 | 2014-02-14 | A kind of Type of Switch Stabilivolt Source Circuit |
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| CN103762869B true CN103762869B (en) | 2016-02-10 |
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| CN104901560A (en) * | 2015-06-24 | 2015-09-09 | 航天长峰朝阳电源有限公司 | High-frequency switch power supply converter employing magnetic amplification technology |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1179239A (en) * | 1995-11-27 | 1998-04-15 | 菲利浦电子有限公司 | Power-supply circuit |
| CN2381093Y (en) * | 1999-03-30 | 2000-05-31 | 斗门县新南壹电子有限公司 | Electronic ballast |
| CN2705944Y (en) * | 2004-04-06 | 2005-06-22 | 毛灿豪 | Transistor switching power supply |
| CN102832823A (en) * | 2012-08-21 | 2012-12-19 | 江苏云意电气股份有限公司 | Self-excitation type high-frequency transformer switch voltage stabilizing power source |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9622133D0 (en) * | 1996-10-24 | 1996-12-18 | Niotech Limited | Inverter circuits |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1179239A (en) * | 1995-11-27 | 1998-04-15 | 菲利浦电子有限公司 | Power-supply circuit |
| CN2381093Y (en) * | 1999-03-30 | 2000-05-31 | 斗门县新南壹电子有限公司 | Electronic ballast |
| CN2705944Y (en) * | 2004-04-06 | 2005-06-22 | 毛灿豪 | Transistor switching power supply |
| CN102832823A (en) * | 2012-08-21 | 2012-12-19 | 江苏云意电气股份有限公司 | Self-excitation type high-frequency transformer switch voltage stabilizing power source |
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Granted publication date: 20160210 Termination date: 20180214 |